/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.compileflow.engine.bpmn.definition;

import com.alibaba.compileflow.engine.core.definition.GatewayNode;
import com.alibaba.compileflow.engine.core.definition.action.IAction;
import org.apache.commons.lang3.StringUtils;

/**
 * @author yusu
 */
public abstract class Gateway extends ActionNode implements GatewayNode<SequenceFlow> {

    private IAction action;
    private String defaultFlowId;

    @Override
    public IAction getAction() {
        return action;
    }

    @Override
    public void setAction(IAction action) {
        this.action = action;
    }

    @Override
    public SequenceFlow getDefaultTransition() {
        if (StringUtils.isNotBlank(defaultFlowId)) {
            return getOutgoingTransitions().stream().filter(transition -> transition.getId().equals(defaultFlowId))
                    .findFirst().orElse(null);
        }
        return getOutgoingTransitions().stream().filter(transition -> StringUtils.isBlank(transition.getExpression()))
                .findFirst().orElse(null);
    }

    public void setDefaultFlowId(String defaultFlowId) {
        this.defaultFlowId = defaultFlowId;
    }

}
